Capillary wicking in a fibrous reinforcement – Orthotropic issues to determine the capillary pressure components

Pucci, Monica Francesca; Liotier, Pierre‐Jacques; Drapier, Sylvain

doi:10.1016/j.compositesa.2015.05.031

Cited by 45 publications

(42 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of the theories currently used to account for the fluid-solid interaction are based on Terzaghi's approximation, adapted to the specific case of composite manufacturing, which relates the hydrostatic pressure on the porous medium with the effective stress transmitted to the fiber bed skeleton [113,114]. The influence of the fluid flow on the elasticity of the porous fabric is not fully understood due to the complexity of the physical phenomena, including yarn/fiber lubrication effects, ply nesting and accommodation, etc.…”

Section: Virtual Processingmentioning

confidence: 99%

“…At the macroscopic scale, impregnation is modeled using the Darcy's law with a homogenized permeability of the fabric. However, flow is not homogeneous at lower scales, and preferential channels are formed as a consequence of the dual scale porosity of the fabric [114] (Figure 12b). Viscous flow is dominant in the yarn-toyarn channels while wicking flow occurs inside the yarns triggered by capillary forces.…”

Section: Virtual Processingmentioning

confidence: 99%

See 1 more Smart Citation

Structural composites for multifunctional applications: Current challenges and future trends

González

Vilatela

Molina-Aldareguía

et al. 2017

Progress in Materials Science

247

132

View full text Add to dashboard Cite

This review paper summarizes the current state-of-art and challenges for the future developments of fiber-reinforced composites for structural applications with multifunctional capabilities. After a brief analysis of the reasons of the successful incorporation of fiberreinforced composites in many different industrial sectors, the review analyzes three critical factors that will define the future of composites. The first one is the application of novel fiberdeposition and preforming techniques together with innovative liquid moulding strategies, which will be combined by optimization tools based on novel multiscale modelling approaches, so fiber-reinforced composites with optimized properties can be designed and manufactured for each application. In addition, composite applications will be enhanced by the incorporation of multifunctional capabilities. Among them, electrical conductivity, energy storage (structural supercapacitors and batteries) and energy harvesting (piezoelectric and solar energy) seem to be the most promising ones.

show abstract

Section: Virtual Processingmentioning

confidence: 99%

Section: Virtual Processingmentioning

confidence: 99%

Structural composites for multifunctional applications: Current challenges and future trends

González

Vilatela

Molina-Aldareguía

et al. 2017

Progress in Materials Science

247

132

View full text Add to dashboard Cite

show abstract

“…This may indicate an increase of the amount of structural pectins (the overall pectins are classified in structural and matrix pectins, this implies that a part of the matrix pectins have been converted into effective structural pectins that are more strongly bonded). Recent studies have proven the positive effect of this kind of treatment on the surface energy of flax fibres [205] and thus on the impregnation by mostly dispersive resins, but also on swelling of those same fibres [207]. Thermal treatment under neutral atmosphere enhances the morphological stability of fibres and allows a more regular interface with a thermoset resin [207] [205].…”

Section: Fibre Treatmentsmentioning

confidence: 99%

“…Recent studies have proven the positive effect of this kind of treatment on the surface energy of flax fibres [205] and thus on the impregnation by mostly dispersive resins, but also on swelling of those same fibres [207]. Thermal treatment under neutral atmosphere enhances the morphological stability of fibres and allows a more regular interface with a thermoset resin [207] [205]. Finally, atmospheric plasma can be used to modify fibres.…”

Section: Fibre Treatmentsmentioning

confidence: 99%

“…They can be dedicated to the investigation of the effects of flow regimes which control the void formation and convection in LCM processes for instance [257][258][259][260], including in dual-scale architectures [257,261,262]. They can also aim at defining equivalent properties such as capillary pressures which are induced by resin flow in fabrics due to capillary effects [263][264][265] and can be input in process simulations [234,266].…”

Section: Impregnation In Bio-based Compositesmentioning

confidence: 99%

See 1 more Smart Citation

Specific features of flax fibres used to manufacture composite materials

et al. 2018

Self Cite

View full text Add to dashboard Cite

The use of composite materials reinforced by flax fibres has been increasing steadily over the last 20 years. These fibres show attractive mechanical properties but also some particularities (naturally limited length, presence of a lumen, fibres grouped in bundles in the plant, complex surface properties and composition). An analysis of the available literature indicates that the quality of the composite materials studied is not always optimal (high porosity, incomplete impregnation, heterogeneous microstructure, variable fibre orientation). This paper reviews published data on the specific nature of flax fibres with respect to manufacturing of biocomposites (defined here as polymers reinforced by natural fibres). All the important steps in the process which influence final properties are analyzed, including the plant development, retting, fibre extraction, fibre treatment, preform preparation, available manufacturing processes, the impregnation step, fibre cell wall changes during processing and fibre/matrix adhesion.

show abstract

Solid epoxy prepregs with patterned resin distribution: Influence of pattern and process parameters on part quality in vacuum‐bag‐only processing

Janzen,

May

2023

Polymer Composites

View full text Add to dashboard Cite

Solid resins (SR) are fully reactive resin systems that are solid at room temperature. Up to a critical temperature they can be quasi‐infinitely molten and solidified without any relevant curing reaction. This study deals with novel SR‐based prepregs where a dry textile is covered with a regular SR (uncured) pattern, allowing for storage and draping at room temperature. The manufacturing of SR prepregs with accurate pattern geometries and the processing of the same into laminates with a pore volume content <1% using a vacuum bag only process is demonstrated for four pattern types and two curing cycles. The study furthermore shows that the pattern design has an influence on the mandatory drying phases as well as on fiber undulations. With sufficiently long drying phases, equivalent pore volume contents and interlaminar shear strength could be obtained with different pattern types.Highlights Manufacturing of carbon fiber (CF) solid epoxy prepregs with patterned resin distribution Epoxy powder processing Out‐of‐Autoclave manufacturing with vacuum‐bag‐only prepregs Interlaminar shear strength of carbon fiber reinforced plastics (CFRP) made of woven CFs Analysis of pore volume content and fiber undulation

show abstract

Capillary wicking in a fibrous reinforcement – Orthotropic issues to determine the capillary pressure components

Cited by 45 publications

References 45 publications

Structural composites for multifunctional applications: Current challenges and future trends

Structural composites for multifunctional applications: Current challenges and future trends

Specific features of flax fibres used to manufacture composite materials

Solid epoxy prepregs with patterned resin distribution: Influence of pattern and process parameters on part quality in vacuum‐bag‐only processing

Contact Info

Product

Resources

About